Thursday, October 30, 2014

There's quite a lot going on in this photo of the base of Elephant rock at Seal Rock State Park. Directly below the lens cap (52 mm diameter) is a bundle of simple laminar beds, then below that is the featured feature, so to speak, a beautiful set off cross-bedded layers. In that set, below and a bit to the left of the lens cap is an example of soft sediment deformation; I'd call that a ball-and-pillow structure. In that same horizon, but about halfway between directly below the lens cap and the right edge, there's another likely example of ball-and-pillow deformation. These are a little amusing, because in a small way, they mimic the overall structure of the invasive Columbia River Basalt forming the resistant cap of this rock. Finally, on the right side, several minor faults cut through the sequence. The interaction of the left-most of them with the cross-bedding is interesting. I'm trying to get back into the habit of hosting these large panoramas elsewhere, so their size isn't so reduced by Blogger; you can right-click the photo and open it in a new tab for full size gloriosity.